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Re: opening the back of a tv
DON'T.. is all I can say unless ya got a real good reason ya really shouldn't do such... Just for a "Look"
However.... usually there are Philips Screws, 4 - 6 or so, around the outside of the Rear Casing Look for Big Holes usually with an arrow or such close by.. remove these and carefully pull back on the Casing and there ya should go..
Be careful there are LETHAL Voltages/Currents.
As an aside whenever one works on any TV equipment it MUST be powered via an ISOLATION Transformer AT ALL TIMES.. as sometimes the actual metal Chassis etc is at MAINS POTENTIAL.. as such is LETHAL Be CAREFUL.
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Short circuited component/s at its main board. Contact any service technician; or the authorized service center. This is not a user repairable fault. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Check power outlet and ensure there is power. If necessary, try the TV on some other power outlet. If it does not switch on, it is better to call in a qualified service technician, as back cover has to be opened.
common problem with LCD TV is a dead screen but there is a sound.
so the problem is always coming from inverter board inside the lcd,
inverter board controls the ccfl bulbs that illuminate the image in the screen.
there are 4 or more bulbs inside your screen supplied by inverter board.
you can see this inside at the back of the screen there are 4 boards inside,
display driver board,power supply board ,inverter board and input board,
this could be repaired or replace.but you need some tools for opening the case and test equipment.
add comment if you want some help..
hope i help you....
I recently found on a 42" Sharp. The inverter module had three fuses on it, inline little fuses markings all begin with an F 1001 etc. a tiny little fuse
f3 I believe had opened and caused exactly what you describe. The inverter module is usually furthest left and attached physically to your lcd panel. Has a metal cover over it. Be careful HIGH VOLTAGES on this pc board. If the fuse has opened. www.shopjimmy.com wonderful recycler of previously used or repaired parts. you can shop them by model #
Magnavox has issues with puffed caps on the power supply. This sounds like its a 32 inch lcd tv. I tried searching for a service manual for this and can't find one. If it is an lcd you need to look at the capacitors on the power supply. If they are puffed up, you will need to replace them with equal or slightly larger valued capacitors. The capacitor values are mfd and voltage printed on the capacitors themselves. You will need a soldering iron to replace them. Lay the tv, if it is an lcd, on a flat surface cushioned by a blanket. Make sure the surface is large enough to support the tv frame, as you don't want to cause damage to the panel. remove the back of the tv. There are numerous screws, and once the back is off, check the power supply pcb for puffed caps. This is the board with the power cord attached. I know in magnavox tv there is a cage covering the power supply, so remove any connectors because you will have to flip the cage housing the power supply to get to the caps. If you feel confident, give it a try. Let me know how it goes
Replace lower scan converter PCB, which plugged into Y-Sustainer Board, located to the left of the display if you poke back cover open. There are 2 of them, but in some models might be the one, long PCB.don't wait to fix it! otherwise, you will knock out Y- Sustainer and upper scan converter. That will cause you to spend few hundreds to fix it. Good luck, Alex's TV Service, Philadelphia, Pa, 215-806-5980.